I would chime in a bit on this too. 14.04 _did_ have such issues. In fact, I had a physical box with static IP's (2 nics), if a cable was unpligged, it would hang forever and also become inconsistent. I had these discussions a year ago or so. Anyway, I had ot abandon ubuntu server (along with some nft issues at the time) and run archlinux as my xen host.
But I ran zfs as my xen backend, so on arch, I sometimes* could have issues ~ once a year where it best be I had physical access to the box to be able to fix any potential issues. I am now going to move abroad and so I thought , with archlinux unpriv. lxc containers out, to leave xen (as I don't have the expected network output from the servers) to lxc. With arch and benig abroad, I think ubuntu 16.04 now with systemd would have solved this (my server with arch on xen has always gracefully sorted it out: ~1.5-2 years). Seeing this bug and seein git has to do with ifup makes me think it's partly a remnance from the older logic from sysv/upstart. This probably doesn't help much butjust saying the ifup is a bit archaic now that systemd is in use and is not evebn present in archlinux and creates seemingly less problems. I have only a brief moment before leaving so seeing this now worries me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1588915 Title: ifup does not block for interface to be up with static addresses To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1588915/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs